Norfloxacin Al (Norfloxacin)

Norfloxacin is a fluoroquinolone antibiotic indicated for several bacterial infections affecting the urinary and genitourinary tracts and the gastrointestinal system.

• Uncomplicated urinary tract infections: eradicates susceptible uropathogens, relieving symptoms and preventing recurrence.
• Acute prostatitis: achieves bacterial clearance in the prostate tissue, reducing inflammation and pain.
• Gonorrhea: eliminates Neisseria gonorrhoeae strains, treating genital infection and limiting transmission.
• Enteric infections (e.g., traveler's diarrhea): controls bacterial pathogens causing acute diarrhoea, restoring normal bowel function.

• Norfloxacin exerts its antibacterial effect by binding to the bacterial enzymes DNA gyrase (topoisomerase II) and topoisomerase IV. Inhibition of these enzymes prevents the supercoiling and separation of DNA strands required for replication and transcription, leading to bactericidal activity against a broad spectrum of Gram‑negative and some Gram‑positive organisms.

Norfloxacin may be associated with a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Nausea: mild stomach upset that often resolves without treatment.
• Diarrhoea: loose stools that may be self‑limiting.
• Headache: transient cranial discomfort.
• Dizziness: occasional light‑headedness.
• Skin rash: mild erythematous eruption.

Serious or Rare Side Effects

• Tendon rupture: sudden tendon pain or rupture, especially in the Achilles.
• QT prolongation: cardiac rhythm disturbances that may lead to arrhythmia.
• Severe allergic reaction: anaphylaxis with swelling, breathing difficulty, or hives.
• Clostridioides difficile colitis: severe diarrhoea due to intestinal flora disruption.

Before prescribing Norfloxacin, clinicians should consider several safety precautions to minimize risk.

• Renal impairment: adjust therapy and monitor renal function.
• History of tendon disorders: avoid use in patients with prior tendon injury.
• Concomitant QT‑prolonging drugs: assess cardiac risk before combination.
• Pregnancy and lactation: use only if benefits outweigh potential risks, as safety data are limited.
• Elderly patients: monitor for CNS effects such as confusion or seizures.
• Store at ambient temperature: keep below 25 °C in the original container, protect from moisture and light.

Norfloxacin can interact with other medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Antacids containing magnesium or aluminum: reduce absorption; separate dosing by at least 2 hours.
• Warfarin: may enhance anticoagulant effect, increasing bleeding risk.
• Theophylline: increased plasma levels leading to toxicity.

Moderate Interactions (Monitor Closely)

• NSAIDs (e.g., ibuprofen): may increase risk of CNS stimulation and seizures.
• Corticosteroids: heightened risk of tendon rupture.
• Diabetic agents (e.g., insulin, sulfonylureas): may cause hypoglycaemia.